no window's buttons
After hibernation (windows 7 x64) missed buttons "minimize, maximize, close" on thunderbitr window, just black field. After reboot it working again, till next hibernation
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That does not look like the default theme. Restart Thunderbird with add-ons disabled (Thunderbird Safe Mode). On the Help menu, click on "Restart with Add-ons Disabled". If Thunderbird works like normal, there is an Add-on or Theme interfering with normal operations. You will need to re-enable add-ons one at a time until you locate the offender.
As Themes are just another add-on. this applies to them as well.
Matt said
That does not look like the default theme. Restart Thunderbird with add-ons disabled (Thunderbird Safe Mode). On the Help menu, click on "Restart with Add-ons Disabled". If Thunderbird works like normal, there is an Add-on or Theme interfering with normal operations. You will need to re-enable add-ons one at a time until you locate the offender. As Themes are just another add-on. this applies to them as well.
This is the default theme, I'll never change it. I have only one addon named "lightning" (its scheduler and calendar) and this is default add on. I have no plugins. After restart thunderbird buttons apear again, but until the next hibernation. thunderbird 52.2.1 x86 russian